(() => {
    // 存取器， 通过setter 和 geeter 访问对象属性
    class Person {
        constructor(firstName, lastName) {
            this.firstName = firstName;
            this.lastName = lastName;
        }
        // 读取器 -- 负责读取数据
        get fullName() {
            return `${this.firstName}_${this.lastName}`;
        }
        // 设置器 -- 负责设置数据的(修改)
        set fullName(val) {
            let names = val.split("_");
            this.firstName = names[0];
            this.lastName = names[1];
        }
    }
    const person = new Person('东方', '不败');
    console.log(person);
    console.log(person.fullName);
    console.log(person);
    person.fullName = '诸葛_孔明';
    console.log(person.fullName);
})();
